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Prototype | ||||||
template <class Matrix, class T> void set_diagonal(Matrix& A, const T& alpha) ; | ||||||
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Description | ||||||
Set the value of the elements on the main diagonal of A to alpha. | ||||||
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Definition | ||||||
mtl.h | ||||||
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Requirements on types | ||||||
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Preconditions | ||||||
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Complexity | ||||||
O(min(m,n)) for dense matrices, O(nnz) for sparse matrices (except envelope, which is O(m)) | ||||||
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Example | ||||||
In tri_pack_sol.cc:
const int N = 4; Matrix A(N, N); set_diagonal(A, 1); //C 1.0 8.0 //C A = 2.0 1.0 b = 25.0 //C 3.0 5.0 1.0 79.0 //C 4.0 6.0 7.0 1.0 167.0 A(1,0) = 2; A(2,1) = 5; A(3,2) = 7; A(2,0) = 3; A(3,1) = 6; A(3,0) = 4; | ||||||
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Notes | ||||||
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See also | ||||||
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